Extension of opening hours SAT/SUN/HOL is generally possible, but require prior permission (PPR) by the airport operator (to be done one workday prior) and will cause extra costs.
MON-FRI extension of opening hours is only possible for home-based aircraft as well as for scheduled traffic. Extra costs might be charged as well. For details please contact C-office (Luftaufsicht) Ph.+49 7541 / 284-120, eMail Luftaufsicht@bodensee-airport.eu
Past 22:00 local time and prior 06:00 local time there is generally no other traffic permitted, except flights for medical purposes (ambulance flights e.g.) or flights approved by the authorities.
Flights outside above operation hours, which are not announced or not announced in time, might expect denial.